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Re: Silly question on IFPs.

From: Dan Brickley <danbri@w3.org>
Date: Tue, 10 Aug 2004 17:04:54 -0400
To: Simon Price <simon.price@bristol.ac.uk>
Cc: www-rdf-interest@w3.org
Message-ID: <20040810210454.GE25518@homer.w3.org>

* Simon Price <simon.price@bristol.ac.uk> [2004-08-10 21:58+0100]
> 
> Whoops! I originally only sent this reply to Manuel by mistake so here's 
> a less concise definition...
> 
> ----
> IFP stands for inverse-functional property. See
> http://www.w3.org/TR/owl-ref/
> 
> It means that a property is "owned" by only one thing. There are more
> mathematical ways of saying it too of course.
> 
> Email addresses in FOAF are considered to be IFP: each person can have
> multiple email addresses (not functional) but each email address can
> have only one owner (functional) - in FOAF it is required that email
> addresses are only used by one person which is not always true in
> reality of course.

Cheers. There's also a longer version of the FOAF-related 
explanation at 
http://rdfweb.org/mt/foaflog/archives/2003/07/10/12.05.33/

I should mention that *some* but not *all* mailboxes are "personal
mailboxes" in the foaf:mbox sense...

Dan
Received on Tuesday, 10 August 2004 21:04:55 UTC

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